November 03 , 2015. EN . Popocatepetl, Klyuchevskoy , Yellowstone.

Popocatepetl, Mexique :

November 2, 11:00 h (November 2, 17:00 GMT)

In the last 24 hours the seismic records of the monitoring system at Popocatepetl volcano registered 64 low-intensity exhalations. During most of the time covered by this report the volcano has been covered by clouds, so the characteristics of all emissions could not be verified; some of them were accompanied by steam and gas. Yesterday afternoon a continuous steam and gas emission was observed . Besides, 12 low-to- moderate intensity explosions occurred; the ash emissions reached a maximum height above the cráter of 1 km and were displaced towards east . No reports of ash fall so far.

At the time of this report the volcano is already covered by clouds.
The other monitoring parameters remaing unchanged.

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments .
This type of activity is included within the scenarios Volcanic Traffic Light Yellow Phase 2.

Source : Cenapred

Photo : Daniel Rivero R

Klyuchevskoy, Kamchatka :

A weak eruption of the volcano continues. Ongoing activity could affect low-flying aircraft.

A weak eruptive activity of the volcano continues. According to video data, moderate gas-steam activity of the volcano was noting. Satellite data by KVERT showed a weak thermal anomaly over the volcano on October 23-24 and 27-28; the volcano was obscured by clouds in the other days of week.

Klyuchevskoy (also spelled Kliuchevskoi) is Kamchatka’s highest and most active volcano. Since its origin about 6000 years ago, the beautifully symmetrical, 4835-m-high basaltic stratovolcano has produced frequent moderate-volume explosive and effusive eruptions without major periods of inactivity. It rises above a saddle NE of sharp-peaked Kamen volcano and lies SE of the broad Ushkovsky massif. More than 100 flank eruptions have occurred during the past roughly 3000 years, with most lateral craters and cones occurring along radial fissures between the unconfined NE-to-SE flanks of the conical volcano between 500 m and 3600 m elevation. The morphology of the 700-m-wide summit crater has been frequently modified by historical eruptions, which have been recorded since the late-17th century. Historical eruptions have originated primarily from the summit crater, but have also included numerous major explosive and effusive eruptions from flank craters.

Source : Kvert, GVP.

Photo :Yu. Demyanchuk. IVS FEB RAS, KVERT

Yellowstone, Etats-Unis :

Seismicity
During October 2015, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 83 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a small earthquake of magnitude 2.4 on October 13, at 06:23 AM MDT, located about 8.5 miles west of Old Faithful, WY.

October 2015 seismicity included a small earthquake swarm of 23 earthquakes occurring on October 13 and 14 (MDT). The largest swarm earthquake (magnitude 2.1) occurred October 13, 09:10 PM MDT, located 9 miles north northwest of West Yellowstone, MT.
Yellowstone earthquake activity in October remains at low background levels.

The Yellowstone Volcano Observatory (YVO) provides long-term monitoring of volcanic and earthquake activity in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.